Answer: 1. Once the bed is established, you can harvest for up to 8 weeks. After that, let all shoots mature to store energy for next year. July sounds about right.
2. The ferny foliage can grow to 4 feet tall.
3. In the fall, cut down the browned fronds, and mulch with straw or leaves
4. The site should have at least 1/2 day of sun. No problem with onions nearby.
5. Germination usually takes between 14 and 21 days.
6. Once you've planted them in the garden, keep the soil evenly moist, and let them grow! Keep the bed well-weeded.
7. If you have good, fertile soil, a fall application to the planting bed, before laying down straw/leaves, should be adequate. You might want to have a soil test done, to evaluate nutrient levels and pH. Test results will include directions for amending soil if necessary.
8. Asparagus likes a moderately rich sandy or loamy soil, rather than heavy clay, with a pH of 6.5 to 7.5. The site should be well-drained, and not be exposed to strong winds.
Hope this helps!
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